Re: Data Modeling

2012-02-21 Thread aaron morton
> For CF PropertyValues, instead of should I do > to preserve the same order for each > property_value ? (there will be custom null value). Whatever works best for you. > Why is using only columns names faster ? It seems that it's not possible to > retrieve column names without column values

Re: Max TTL?

2012-02-21 Thread Erik Forsberg
On 2012-02-20 21:20, aaron morton wrote: Nothing obvious. Samarth (working on same project) found that his patch to CASSANDRA-3754 was cleaned up a bit too much, which caused a negative ttl. https://issues.apache.org/jira/browse/CASSANDRA-3754?focusedCommentId=13212395&page=com.atlassian.jir

Re: about the deep clone operation in the cassadra source code

2012-02-21 Thread aaron morton
You'll need to be a bit more specific and come up with some steps to reproduce a problem. Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 21/02/2012, at 3:55 PM, zhangcheng wrote: > When I read the cassandra code, there are too many deep

Cassandra 1.1 row isolation cross datacenter replication

2012-02-21 Thread Allen Servedio
Hi, I saw that row level isolation was added in the beta of Cassandra 1.1 and I have the following question: given a ring that has two datacenters and a keyspace defined to replicate to both, if a row is written with local quorum to the first data center, will it still be isolated when it replicat

What linux distro for the Cassandra nodes ?

2012-02-21 Thread Aditya Gupta
I am about to choose a linux distro to be installed on Cassandra nodes. Which are the most popular & recommended ones by Cassandra community? (Not interested in paying licensing fees)

Re: Cassandra 1.1 row isolation cross datacenter replication

2012-02-21 Thread Benoit Perroud
The isolation is guarantee locally to the node. If two client are reading / writing to the same node, the one that read will not see partial mutations. 2012/2/21 Allen Servedio : > Hi, > > I saw that row level isolation was added in the beta of Cassandra 1.1 and I > have the following question: gi

Re: Flume and Cassandra

2012-02-21 Thread Alain RODRIGUEZ
Thanks for answering. "This is a good starting point https://github.com/thobbs/flume-cassandra-plugin " I already saw that, but it only does a raw store of the logs. I would like too store them in a "smart way", I mean I'd like to store logs to be able to use information contained into them. If

Re: Issue regarding 'describe' keyword in 1.0.7 version.

2012-02-21 Thread Dave Brosius
What it's saying is if you define a KeySpace Foo and under it a ColumnFamily called Foo, you won't be able to use describe to describe the ColumnFamily named Foo. On 02/21/2012 07:26 AM, Rishabh Agrawal wrote: Hello, I am newbie to Cassandra. Please bear with my lame doubts. I running Cas

[ANN] Cassandra Europe 2012

2012-02-21 Thread Eric Evans
Hi everyone! Announcing Cassandra Europe 2012 - March 28, London www.cassandra-eu.org Acunu is proud to announce the first Apache Cassandra Europe Conference in London on March 28. This is a packed one-day event with two tracks - 'Case Studies' and 'Cassandra 101 - Beat the learning curve'. You

Logging 'write' operations

2012-02-21 Thread A J
Hello, What is the best way to log write operations (insert,remove, counter add, batch operations) in Cassandra. I need to store the operations (with values being passed) in some fashion or the other for audit purposes (and possibly to undo some operation after inspection). Thanks.

Re: Conflict resolution for counter columns streamed via sstableloader

2012-02-21 Thread Sylvain Lebresne
On Tue, Feb 21, 2012 at 2:46 AM, Omid Aladini wrote: > I'm trying to stream multiple sets of sstables containing counter > columns to a cassandra 1.0.7 cluster. Each set is streamed via > sstableloader separately and concurrently via multiple hosts. What's > the expected behavior of conflict resol

Re: What linux distro for the Cassandra nodes ?

2012-02-21 Thread Aditya Gupta
@Edward: That's nice to know, but I also heard that there are some bugs in some recent Ubuntu version that bubble up with Cassandra specifically, so I was thinking I should probably go with what's more widely used by other Cassandra users for production needs. On Tue, Feb 21, 2012 at 8:57 PM, Edwa

Re: What linux distro for the Cassandra nodes ?

2012-02-21 Thread Pierre-Yves Ritschard
The FAQ page on ubuntu has valid pointers: http://wiki.apache.org/cassandra/FAQ#ubuntu_hangs On Tue, Feb 21, 2012 at 9:10 PM, Aditya Gupta wrote: > @Edward: That's nice to know, but I also heard that there are some bugs in > some recent Ubuntu version that bubble up with Cassandra specifically, s

Re: [BETA RELEASE] Apache Cassandra 1.1.0-beta1 released

2012-02-21 Thread Maki Watanabe
The link is wrong. http://www.apache.org/dyn/closer.cgi?path=/cassandra/1.1.0/apache-cassandra-1.1.0-beta1-bin.tar.gz Should be: http://www.apache.org/dyn/closer.cgi?path=/cassandra/1.1.0-beta1/apache-cassandra-1.1.0-beta1-bin.tar.gz 2012/2/21 Sylvain Lebresne : > The Cassandra team is pleased to

RE: Doubt regarding CQL

2012-02-21 Thread Rishabh Agrawal
FYI .. I am using 1.0.7 version on Ubuntu 11.10 Need help asap From: Rishabh Agrawal Sent: Wednesday, February 22, 2012 11:49 AM To: user@cassandra.apache.org Subject: Doubt regarding CQL Hello I have installed CQL drivers for python. When I try execute cqlsh I get following error cql-1.0.3$ c